Feature #8 delicate array wrapping Many.from_value

[sclinede]

In my thoughts this feature also adds problem when value is Hash. Since after Many.from_value it would not be same object as expected, for example.
But on the other hand following code would work well (borrowed from #8):

Blaher = Struct.new(:blahs)
Bloher = Struct.new(:blohs)
blahers = [Blaher.new([Bloher.new([1, 2, 3, 4])])]
Monads::Many.new(blahers).blahs.blohs.values
# => [1,2,3,4]

This PR is opened for discussion.

[sclinede]

Should be solved with #9